My chart is stuck on maximize

[ri627]

I don't know what happened. I must have triggered a hot key unknowingly, but I can't get my chart to minimize.

I usually have a six chart layout and I click on the expanding arrows and the chart enlarges to full screen.
Then I click again and I am back to my six chart layout. Now the expanding arrows are gone. Everything except the chart is gone. See attached screenshot.

How do I get out of this maximized screen?

 

[ri627]

Got it.
F7 toggles between full view and back to normal view.